// Copyright (C) 2013 Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//         * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//         * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//         * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// @fileoverview Generic string utility functions.
var string = string || {};

(function() {

string.contains = function(a, b)
{
    return a.indexOf(b) != -1;
}

string.caseInsensitiveContains = function(a, b)
{
    return a.match(new RegExp(b, 'i'));
}

string.startsWith = function(a, b)
{
    return a.indexOf(b) == 0;
}

string.endsWith = function(a, b)
{
    return a.lastIndexOf(b) == a.length - b.length;
}

string.isValidName = function(str)
{
    return str.match(/[A-Za-z0-9\-\_,\+]/);
}

string.trimString = function(str)
{
    return str.replace(/^\s+|\s+$/g, '');
}

string.collapseWhitespace = function(str)
{
    return str.replace(/\s+/g, ' ');
}

})();